Toolholder for machine tool turrets



Sept. 21, 1943. c. L. STOEN 2,330,156

TOOL HOLDER FOR MACHINE TOOL TURRETS Filed Oct. 1, 1941 Patented Sept. 21, 1943 TOOLHOLDER FOR MACHINE TOOL runners Clifford L. steen, WestSt. Paul, Minn, assignor to The Warner & Swasey Company, Cleveland, Ohio, a corporation of Ohio Application October 1, 1941, Serial No. 413,131 (01.10-101) Claims.

This invention relates to tool holders for turrets of machine tools.

In mounting on a face of a machine tool tur-- ret a tool holder which is provided with means for feeding a cutting tool it has been found that such feeding means often interferes with or prevents the mounting of'a cutting tool on the next adjacent face of the turret.

The principal object of the present invention is to provide a tool holder that has means for feeding a cutting tool carried by the holder and which tool holder is so constructed and can be so mounted on a face of a machine tool turret that the feeding means of the tool holder and the other cutting tools or tool holders mounted on the adjacent faces of the turret do not conflict with each other, whereby every face of the turret may carry a cutting tool or tool holder capable of functioning in the desired manner and also allowing for operation of the feeding means of said first tool holder.

A more specific object of the invention is to provide a thread cutting tool holder that has mechanism for feeding the tool and which tool holder is so constructed and can be so mounted ona face of a machine tool turret that every other face of the turret may be equipped with a tool or tool holder without interfering with said feeding mechanism of the thread cutting tool holder. t

Another object of the invention is to provide a tool holder having a cutting tool holding slide and mechanism for imparting feeding movements to said slide and which tool holdenslide and mechanism are so constructed and interrelated that said mechanism lies closely adjacent to the shank or body of the tool holder.

Further and additional objects and advantages not hereinbefore referred to will become apparent hereinafter during the following detailed description of an embodiment of the invention which is illustrated in the accompanying drawing wherein,

Fig. 1 is a plan view of a square turret of a machine tool and shows a portion of a work piece being machined by a cutting tool carried by a tool holder embodying the invention and mounted on one face of the turret, while another tool holder carrying a cutting tool is mounted on the adjacent turret face and in addition portions of similar tool holders are shown mounted on the remaining turret faces.

Fig; 2 is a side elevational View of the upper portion of the turret showing the tool holder mountedon the face of the turret, while the tool or block I4 and which tenon slidably 'interfits' holder that is mounted on the adjacent face of the turret is shown in section.

Fig. 3 is a sectional view taken on line 3-3 of Fig. 1, and

Fig. 4 is a sectional v1ew taken on line l-l of Fig. 2.

The drawing illustrates, by way of example, a square turret 5 which, as is well understood in the art, is indexible and is carried by the cross slideof a carriage slidable on the machine tool bed, wherefore cutting tools on the turret can be brought into and from cutting relationship with respect to the'work piece 6 which is rotatably carried by the work' spindle, and can also be fed along. the work piece.

The turret 5 is provided on its vertical faces with horizontal grooves l in which may be mounted tools or tool holders 8 of conventional construction. The tool ortool holders 8 are clamped in position by means of setscrews 9 and, as shown, each of the tools or tool holders 8 extends outwardly from a face of the turret with each tool or tool holder extending past the inner --stance, is arranged obliquely relative to the shank or bar, it being understood, however, that said extension might be positioned at a different angle with respect to the shank or it might ex tend straight fromthe shank. The straight shank H, of the tool holder is mounted in a groove! on one face of the turret and'clamped in place by setscrews l 3 similar to the setscrews 9 which clamp the tools or tool holders 8 in po-' sition. When the shank ll is so clamped in osition inthe groove 1 on the face of the turret the extension l2 projects outwardly from the face of the turret as clearly shown in Figs. 1

and 2. The extension or oblique bar portion l2 is provided with a guideway for a movably mounted tool support, block o slide I4. "As mus-f. tratedinFig. 3, the guideway on the extension p or oblique bar portion l2 may be in the form of a dovetail groove having a gib [6 which can be engaged'with one side of a tenon on theslide edge l9 and the usual edge 2|] parallel to the direction of movement of the blockor slide |4.

It will be understood that movement is im parted to the tool support, slide or block M to adjust or feed the cutting 'toolll relative. to the work piece and various mechanisms may be employed within the compass of the present invention for imparting thismovement-rto the support, slide or block I4. As illustrative of one form of such mechanisms a threaded shaft-or screw. 2| is. provided and, said. shaft hasv areduced bearing endportion. which rotatablyinterfits a bearing. 22 carried by theshank adjacent the extension or oblique bar portion. I2.

The shaft or screw 2| is rotatably supported by a bearing bracket 23 and has at the right hand.

end of the threaded portion a shoulder which bearsagainst. saidbearing bracket. The bear.- ing bracket 23 is secured to thebar-or shank, by.a bolt;24.. The shaft or screw. 2| extends a substantial distance to the right beyondthe bracket 23 and beyond the-adjacent faceof the turret in a manner later to be referred to.

A-follower or nut 25 .is mounted onthethreaded portion of the shaft orscrew 2| intermediate the bearings 22and 23. A link 26 hasone of its ends pivotally connected to. the nut or. follower 25, as indicated at 21, while the opposite end,.of' said link is forked and embraces a rearward extension Ma ,of the toolblock, or slide |4.. A pivotor bearing pin 28 extends through thearms 29 of the forked end of the link. 26'and through the rearward extension Me of the tool block or.slide |4.;

It will thus .be seen thatwhen thescrew or.

shaft 2| isrotated the follower or nut 25 will move linearly to the right or to the left and throughthe link 26 will cause the tool block or slideto move linearly of the guideway of the extension |2.

The right handend of the. screw or shaft 2|. has-secured. thereto a knob 30 in the form of a graduated dial with the graduations thereof, which. may bein the-form of indicia, cooperate ingwith a pointer 3| carriedby ausleeve 32 secured to .the bracket23. The pointer 3| .and the knob.30,. therefore, visibly-indicate the adjustment which hasbeen imparted to the tool I? and..the tool support, block or slide 4.

It.will benotedthat the shaft or screw 2| is located atthe sideof and below the shank or bar H and parallel thereto, see Fig. 2, and further that the bracket 23 and the knob 30 andpointerv 3| are spaced apart sufficientlyfar to enable a tool or tool holder on the adjacent face of the,turret to pass therebetween and above the shaft 2| as clearly shown in Fig. 2. Therefore the tool holder embodying the present invention can beapplied as a unitary structure to or removed from the,face of the turret or adjusted thereon without interfering in any way'with thetool ,or tool holder on the adjacent face of the turret- Conversely, the tool or tool holder on said adjacent face of theturret can be removed from or applied to or adjusted on the;adjacent face of the turret without interfering in any way with the tool holder of the present invention when the latter is mounted on the turret.

Although a preferred embodiment of the invention has been illustrated and described herein it will be understood that the invention is susceptible of various modifications and adaptations within the scope of the appended 'Iclaims;

What is claimedis:

l. A tool holder for lathe turrets comprising, a straight bar portion, an oblique extension having.an..undercut groove therein, a tool holding block having a portion thereof dovetailed into said undercut groove and slidable therein, a tool releasably fitted in said block, a screw extending closely adjacent and longitudinally of said straight bar; a' follower threaded upon said screwgand. a connection between said follower and said tool holding block to permit sliding movement of said block relative to said oblique bar extension .upon. rotation. of .said' screw.

2. A tool holder for lathe turretscomprising, a relatively. straight barv member having, an

oblique portion. at one endthereof, said oblique.

between said follower and said tool holding block.

to permit movement of said block upon rotation of said. screwwhen said block securing .means is released.

3. A tool holder for lathe turrets comprising,

a bar including a relativelystraight portion and an oblique portion, a tool holding block slidably.

supported by said oblique bar portion, a screw supported by said bar adjacent the lower side thereof, a follower onsaid screw, and a link pivotally'connecting said follower tosaid block and lying substantially parallel to and closely adjacentsaid screw.

4. A too holderfor machine tool turrets com-. prising a shank-portion adapted to be secured to a-turret face and having at one end. an exten sion, atool support carriedby said extension and movable thereon, actuating means located at the side and below said shank and supported thereby, and means operatively interconnecting saidwsupport and-said actuating means.

5. A tool holder for. machine tool turrets .comprising a-shank portion adapted :to be secured to a turret face and having at one endanextension, a,-tool support carried by said extension. and movable thereon, actuating means'located at the side and below said shank and parallel thereto and supported thereby, eratively interconnecting said support and said actuating means.

6. A tool'holder for machine tool turrets com prising a shank portion adapted to be'secured to a turret face and havingatone end an extension, a tool support carried by saidvextension an operating element, andmeansoperatively. interconnecting said support and. said iactuating means. 1

7. A-tool holder for machine tool turrets: comprising a shank portion-adapted to,;be secured: ;,to a turret face and; having :at .one ,endraniextenze" and means opextending sion, a tool support carried by saidcextension and movable thereon, actuating means carried by said shank and located at the side and below the same and parallel thereto and having a portion extending beyond the other end of the shank and provided with an operating element, and means operatively interconnecting said support and said actuating means.

8. A tool holder for machine tool turrets comprising a shank portion adapted to be secured to a turret face and having at one end an extension provided with a guideway, a tool support slidable in said guideway, actuating means located at the side and below said shank and supported thereby, and means operatively interconnecting I said support and said actuating means.

9. A tool holder for machine tool turrets comprising a shank portion adapted to be secured to a turret face and having at one end an extension and provided with bearings spaced longitudinally thereof, a tool support carried by said extension and movable thereon, rotatable actuating means and the other of said bearings adjacent said extension, a tool support carried by said extension and movable thereon, an actuating shaft mounted in said bearings and having a portion extending a substantial distance beyond said other end of said shank portion and provided with an operating element, and means operatively connected to said tool support and to said shaft intermediate said bearings for transmitting movement of said shaft to said support.

CLIFFORD L. STOEN. 

